CN114913809A - Car light display screen control system based on Mini LED light source - Google Patents
Car light display screen control system based on Mini LED light source Download PDFInfo
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- CN114913809A CN114913809A CN202210232692.7A CN202210232692A CN114913809A CN 114913809 A CN114913809 A CN 114913809A CN 202210232692 A CN202210232692 A CN 202210232692A CN 114913809 A CN114913809 A CN 114913809A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/22—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments for reverse drive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
- B60Q1/34—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic for indicating change of drive direction
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention provides a car light display screen control system based on a Mini LED light source, which comprises: a control unit: the system comprises a power supply reverse connection prevention circuit, a system base chip, a single chip microcomputer, a DCDC controller, a blue and green light LED power supply circuit, a red light LED power supply circuit, an image data storage chip and a first connector; a display unit: the LED driving circuit comprises a second connector, a Mini LED driving chip and a Mini LED light source array; the control unit and the display unit are in communication connection through the first connector and the second connector. The invention takes the Mini LED as the light source, and can provide personalized and visual image display so as to reduce the incidence rate of traffic accidents. Tens of thousands of Mini LED lamp beads are integrated on the physical size of a smaller display screen to solve the technical problems of low luminous efficiency, short service life and large size which generally exist in the technical field of the existing display screen and lead to the unsuitability for the application in the field of automobiles.
Description
Technical Field
The invention relates to the technical field of vehicle lamp display control, in particular to a vehicle lamp display screen control system based on a Mini LED light source.
Background
With the progress of scientific technology and the development of economic society, automobiles become one of more and more travel tools for families gradually, the automobiles are assembled by a plurality of parts, in order to facilitate the safe driving of the automobiles at night or in a dark environment, the automobiles are all provided with automobile lamps, along with the improvement of the development of the automobile lamps and the aesthetic requirements of users, in the prior art, the automobile lamps only can uniformly change the luminous brightness or the luminous color, the high personalization and the high complexity cannot be realized, the shapes and the structures of automobile logos, arrows, characters and the like can not be displayed, the existing implementation scheme is more difficult to realize the balance of clear presentation and space sizes, or the luminous color is poor in comparison, or a large space needs to be occupied, the automobile lamps cannot adapt to the smaller and smaller space sizes, and the user experience is poor.
The traditional liquid crystal display screen is adopted as a display screen scheme, although the liquid crystal display screen technology is quite mature, the liquid crystal display screen adopts a backlight source to emit light, the black part on the screen during the work period achieves the black effect by adjusting the orientation of liquid crystal, and the backlight source always emits light, so that the light emitting efficiency is low. Poor color contrast, short service life and the like, so that the LCD can not be used as a display screen outside a vehicle with relatively severe environment.
The display screen using the larger packaged RGB LED as the light source has many mature applications in the civil and commercial fields, and generally, the direct-insert LED or the larger packaged surface mount LED is used as the light source of the display screen. Because the internal space of the car lamp is limited, the number of the RGB LEDs which are usually installed is small, so that the number of display pixels is low, and the effect is poor when complex pictures or video information is displayed; if the display effect is improved, more pixel points can be obtained only by enlarging the size of the display screen, and the condition cannot meet the requirement of using the display screen inside the car lamp with limited space.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vehicle lamp display screen control system based on a Mini LED light source.
According to the invention, the control system of the car lamp display screen based on the Mini LED light source comprises:
a control unit: the system comprises a power supply reverse connection prevention circuit, a system base chip, a single chip microcomputer, a DCDC controller, a blue and green light LED power supply circuit, a red light LED power supply circuit, an image data storage chip and a first connector;
a display unit: the LED light source module comprises a second connector, a Mini LED driving chip and a Mini LED light source array;
the control unit and the display unit are in communication connection through the first connector and the second connector.
Preferably, the system base chip is connected with the automobile storage battery and the automobile CAN communication line, the signal output end of the system base chip is connected with the power supply reverse connection prevention circuit, the system base chip is in communication connection with the single chip microcomputer, two linear voltage regulators are integrated in the system base chip and respectively provide power for the singlechip and the image storage chip, the power supply reverse connection preventing circuit is connected with the automobile storage battery in a power supply mode, the output end of the power supply reverse connection preventing circuit is connected with the input end of the DCDC controller, the output end of the DCDC controller is respectively connected with the blue light LED power supply circuit, the green light LED power supply circuit and the red light LED power supply circuit, the image data storage chip is in communication connection with the single chip microcomputer, the image data storage chip is used for storing image data displayed by the vehicle lamp, the output ends of the blue and green light LED power supply circuits and the red light LED power supply circuit are connected with the first connector, and the single chip microcomputer is in communication connection with the first connector.
Preferably, the Mini LED driving chip is in communication connection with the single chip microcomputer through a first connector and a second connector, the output ends of the blue and green LED power supply circuits are connected with the input end of the Mini LED light source array through the first connector and the second connector, the output end of the red LED power supply circuit is respectively connected with the input end of the Mini LED light source array and the input end of the Mini LED driving chip through the first connector and the second connector, and the Mini LED driving chip is in communication connection with the Mini LED light source array.
Preferably, the power supply reverse connection prevention circuit comprises a high-power NMOS tube, the output end of the reverse connection prevention circuit is controlled to be opened or closed through the high-power NMOS tube, and the system base chip is connected with the grid electrode of the high-power NMOS tube.
Preferably, the power supply voltage of the blue and green light LED power supply circuits is.V, and the power supply voltage of the red light LED power supply circuit is.V.
Preferably, the single chip microcomputer receives and analyzes the CAN message from the system basic chip, calculates and processes image data to be displayed according to CAN message data and data of the image data storage chip, and the image data is transmitted to the Mini LED driving chip through the first connector and the second connector.
Preferably, the first connector and the second connector are of a split structure, the second connector is a patch type wire-to-board connector, and the second connector and the Mini LED driving chip are subjected to reflow soldering together.
Preferably, the Mini LED light source array adopts RGB three-color Mini LEDs or adopts single-color Mini LEDs.
Preferably, the control unit further comprises a sound assembly circuit, the sound assembly circuit comprises a driving circuit and a loudspeaker, a power end of the driving circuit is connected with an output end of the power anti-reverse connection circuit, the single chip microcomputer is in signal connection with the driving circuit, and an output end of the driving circuit is connected with the loudspeaker through a first connector.
Preferably, by acquiring external environment information, the single chip microcomputer adjusts the current of the Mini LED light source array according to the external environment information, and changes the display brightness; the external environment information comprises weather and external brightness; and the external environment information is acquired through a vehicle body sensor.
Compared with the prior art, the invention has the following beneficial effects:
1. the display unit and the control unit thereof which take the Mini LED as the light source can be used in the car lamp assembly, and compared with a simple safety prompting mode of only starting the daytime running lamp or the double flashing lamp of the car lamp, the invention can provide personalized and visual image display so as to reduce the incidence rate of traffic accidents.
2. The invention can integrate tens of thousands of LED lamp beads on a smaller display screen physical size by using the Mini LED to solve the technical problems of low luminous efficiency, short service life and large size which are generally existed in the technical field of the existing display screens and are not suitable for being used in the field of automobiles.
3. By adopting the design mode of no power failure, the system basic chip ensures ultralow power consumption, and simultaneously can wake up the system to display images even under the condition that the whole vehicle is flameout and sleeps, thereby expanding the use scene of the system.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of a vehicle light display screen control system according to the present invention;
FIG. 2 is a schematic diagram of a connection manner between a control unit and a display unit according to the present invention;
FIG. 3 is a schematic diagram of a Mini LED with two different types of emission colors according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a PCB structure of a Mini LED display unit of the present invention;
FIG. 5 is a system block diagram of an integrated audio component circuit in an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a system with low power consumption according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an image display according to an embodiment of the present invention;
fig. 8 is a comparison graph of the arrangement number of the general LEDs and the Mini LEDs in the same area.
Description of reference numerals:
second connector 9 of power supply reverse connection preventing circuit 1
System basic chip 2 Mini LED driving chip 10
Singlechip 3 Mini LED light source array 11
DCDC controller 4 drive circuit 12
Blue and green light LED power supply circuit 5, horn 13
Image data storage chip 7 substrate 15
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention discloses a vehicle lamp display screen control system based on a Mini LED light source, which is a small-size high-pixel full-color vehicle lamp display screen system. While operating with very low power consumption during vehicle hibernation reduces battery power consumption. As a vehicle-pedestrian interaction interface, compared with the existing vehicle lamp which only depends on the simple prompts of flickering, running water and the like of one or more LEDs, the vehicle lamp display screen can adapt to different scenes to be displayed in the form of pictures or videos, and achieves the safety warning effect of individuation, visualization and comprehensibility of pedestrians.
The car light display screen control system based on the Mini LED light source comprises a control unit and a display unit, and refers to fig. 1, wherein the control unit comprises a power supply reverse connection prevention circuit 1, a system base chip 2, a single chip microcomputer 3, a DCDC controller 4, a blue and green light LED power supply circuit 5, a red light LED power supply circuit 6, an image data storage chip 7 and a first connector 8, the display unit comprises a second connector 9, a Mini LED driving chip 10 and a Mini LED light source array, and the control unit and the display unit are in communication connection through the first connector 8 and the second connector 9.
The system comprises a system base chip 2, a power supply reverse connection prevention circuit 1, a single chip microcomputer 3, an image data storage chip 7, a single chip microcomputer 3, a blue light LED power supply circuit 5, a green light LED power supply circuit 6, an image data storage chip 7, a single chip microcomputer 3 and an image data storage chip 7, wherein the system base chip 2 is connected with an automobile storage battery communication line, the signal output end of the system base chip 2 is connected with the power supply reverse connection prevention circuit 1, the system base chip 2 is in communication connection with the single chip microcomputer 3, the output end of the power supply reverse connection prevention circuit 1 is connected with the input end of the DCDC controller 4, the output end of the DCDC controller 4 is connected with the blue light LED power supply circuit 5 and the red light LED power supply circuit 6 respectively, the output ends of the blue light LED power supply circuit 5 and the green light LED power supply circuit 6 are in communication connection with the first connector, and the single chip microcomputer 3 is in communication connection with the first connector 8.
The power supply reverse connection preventing circuit 1 is controlled by the system base chip 2, the specific control mode is that a grid electrode of an NMOS tube in the power supply reverse connection preventing circuit 1 is connected with the system base chip 2, the system base chip 2 can close the power supply reverse connection preventing circuit 1 during the vehicle dormancy period, and a sub circuit connected with the power supply reverse connection preventing circuit 1 cannot obtain the voltage from a storage battery. During the system operation, the output end of the power supply reverse connection prevention circuit 1 is opened, and the storage battery voltage flows into the input end of the DCDC controller 4 through the power supply reverse connection prevention circuit 1.
The input end of the system base chip 2 is connected to the positive electrode of the storage battery of the vehicle body and the CAN network of the vehicle body, the system base chip 2 converts the power supply (usually 13.5V) of the storage battery into a 5V power supply and outputs the 5V power supply to the power supply input pin of the singlechip 3, and meanwhile, the system base chip 2 receives the CAN network message from the vehicle body and sends the CAN message data to the CAN data interface of the singlechip 3 after analysis. The singlechip 3 calculates according to the CAN message data and the data of the image data storage chip 7, selects the image data to be displayed, and the image data realizes the cross-board transmission of the control unit and the display unit through the first connector 8 and the second connector 9. The Mini LED driving chip 10 turns on or off the corresponding pixel in the Mini LED light source array 11 according to the image data.
The output ends of the blue and green light LED power supply circuits 5 are connected with the input end of the Mini LED light source array 11 through a first connector 8 and a second connector 9, the output end of the red light LED power supply circuit 6 is respectively connected with the input end of the Mini LED light source array 11 and the input end of the Mini LED driving chip 10 through the first connector 8 and the second connector 9, the Mini LED driving chip 10 is in communication connection with the Mini LED light source array 11, and the Mini LED driving chip 10 is in communication connection with the single chip microcomputer 3 through the first connector 8 and the second connector 9. The input ends of the red LED power supply circuit 6 and the blue and green LED power supply circuit 5 are simultaneously connected to the output end of the DCDC controller 4, the blue and green LED power supply circuit 5 provides 3.8V power for the LED wafers emitting blue light and green light in the Mini LED light source array 11, and the red LED power supply circuit 6 provides 2.8V power for the LED wafers emitting red light and the Mini LED driving chips in the Mini LED light source array 11.
The circuit of each component in the system is further described below.
Power supply reverse connection preventing circuit 1: the power supply anti-reverse-connection circuit comprises a first-stage circuit for providing power supply for a display unit, a Mini LED light source array 11 of the display unit comprises thousands of Mini LEDs, and the current is large when the Mini LEDs are lightened, so that a high-power NMOS tube is used in the power supply anti-reverse-connection circuit 1, the opening and closing state of the output end of the power supply anti-reverse-connection circuit 1 is realized by the conduction or the closing of the high-power NMOS tube, and the grid electrode of the high-power NMOS tube is controlled by a system base chip 2. Meanwhile, when the power supply is reversely connected, the reverse connection is prevented by utilizing the unidirectional characteristic of the parasitic diode in the MOS tube. And a diode does not need to be added for reverse connection prevention, so that the design cost of the circuit is reduced.
System base chip 2: at least 2 linear voltage regulators (LDO) are integrated in the chip, 5V power supplies are respectively provided for the single chip microcomputer 3 and the image data storage chip 7, a CAN transceiver is integrated in the chip and used for communicating with a vehicle body end, and a charge pump output is integrated in the system base chip 2 and used for controlling a grid electrode of a high-power NMOS (N-channel metal oxide semiconductor) tube in the power supply reverse connection prevention circuit 1.
The singlechip 3: and receiving the CAN message from the system base chip 2, and analyzing, calculating and processing the image data to be displayed.
The DCDC controller 4: and power supplies of two channels are provided and are respectively combined with the blue light LED power supply circuit 5, the green light LED power supply circuit 5 and the red light LED power supply circuit 6, and the storage battery power supply is converted into voltage required by the display unit during normal work. The DCDC controller 4 has the characteristics of open-short circuit diagnosis of the power supply, and can close the line output when a system fault occurs, such as 3.8V power supply wire harness damage and ground wire short circuit, and open the output after the fault is eliminated.
Image data storage chip 7: image data for display is stored.
Referring to fig. 2, a patch type wire-to-board connector is adopted at the display unit end, and the second connector 9 and the Mini LED driving chip 10 can be subjected to reflow soldering together without secondary soldering, so that the production efficiency is improved. The display element after the welding shaping includes PCBA and pencil two parts, and PCBA installs inside the car lamp cavity in the installation, and the cavity outside is arranged in to the pencil other end, need not to carry out the grafting operation to the PCBA interface of installing in the cavity again, and conventional mode does not contain the pencil part, because the less degree of difficulty that has increased the interface grafting in car lamp space after the PCBA of display element has been installed, just need consider the interface orientation problem at the beginning of the structural design of car lamp simultaneously.
Mini LED driver chip 10: and receiving the image data of the singlechip 3 and driving the Mini LED light source array 11 to be turned on and off.
Mini LED light source array 11: each Mini LED can be independently turned on and off, and the display content of the Mini LED light source array 11 can truly reflect the image data which is pre-embedded and stored. By using Mini LEDs capable of RGB three-color display, the single size of the Mini LEDs is 1.0mm by 0.8mm, and more LEDs can be integrated on the limited PCB size to increase the number of pixels. Compared with the RGBLED with the prior size, the size is 3.5mm 2.8mm 2.0 mm; the display effect of the same size picture is poor if the number of common rgb leds can be accommodated in the same PCB size.
Referring to fig. 3, the Mini LED light source array 11 in the present invention may adopt a Mini LED with a light source of RGB three-color display, and may also adopt a monochrome Mini LED, for example, a Mini LED with RRR full red display, so as to reduce the cost or meet the requirement of low-profile vehicle type on color. When a monochrome Mini LED is selected, the circuit portion of the Mini LED driving chip 10 does not need to be changed, and the blue and green LED power supply circuits 5 in the control module, which are responsible for supplying power to the green and blue LED wafers, do not need to be mounted during the generation process, and do not need to be changed for other sub-circuits of the control module.
The Mini LED light source array 11 is the final image display component, and the dot pitch between the Mini LEDs can be designed according to the requirements. The PCB size of the display unit is designed according to the internal cavity structure of the car lamp, and the number of Mini LEDs is correspondingly reduced or increased. The bottom surface of the display unit is composed of a Mini LED driving chip 10, the Mini LED driving chip 10 adopts LP5891-Q1 of Texas instruments, and the Mini LED driving chip 10 receives image data from the single chip microcomputer 3 to drive the Mini LED at the corresponding position to be turned on or off.
Referring to fig. 4, the Mini LED light source array 11 is an image display terminal, the black part in the image is realized by turning off the corresponding Mini LED, and a pure black effect can be achieved by covering a black adhesive layer on the surface and the gap. The black glue layer on the surface can also play a role in protecting the Mini LED from being vulcanized and corroded. The display effect and the service life of the product are improved.
In consideration of the self heating factor of the Mini LED light source array 11, the FR4 substrate 15 or the ceramic substrate 15 is used on the Mini LED light source array 11, or a composite FR4 substrate 15 embedded in ceramic can be adopted, and the ceramic has high heat conductivity, so that the complex modeling and dynamic requirements can be met, and a good heat dissipation effect can be achieved.
The control unit also includes a sound assembly circuit to cooperate with the display of the picture or animation of the display unit. Referring to fig. 5, the sound assembly circuit includes a driving circuit 12 and a speaker 13, a power end of the driving circuit 12 is connected to an output end of the power reverse connection preventing circuit 1, the single chip microcomputer 3 is in signal connection with the driving circuit 12, and an output end of the driving circuit 12 is connected to the speaker 13 through a first connector 8. The single chip microcomputer 3 controls the driving circuit 12 through the PWM signal, can modulate different sounds according to different scenes, and can drive the speaker 13 to emit corresponding sounds according to the displayed content in the display system, thereby enhancing the display effect. The method is particularly suitable for: for example, according to the regulation requirement, when the electric automobile runs at low speed, the engine is simulated to make a sound, the control unit is used for prompting and warning the low speed or reverse gear of the electric automobile, the control unit obtains the speed and gear signals through the CAN bus, and when the speed per hour of the automobile is lower than a set value (such as 19Km/h), the driving circuit 12 drives the horn 13 to make a sound similar to the acceleration and deceleration of the engine of the fuel automobile. When the gear is reversed, the device can also send a reverse warning, thereby reminding pedestrians and vehicles outside the vehicle.
In the system, a control unit is a control core part of the whole display screen system, input interfaces of the control core part are divided into two types, a power supply wire harness is connected to a storage battery of the whole vehicle, and a data wire harness is connected to a CAN bus of the whole vehicle. The power wire harness is connected to the inside of the single chip microcomputer 3 and firstly passes through the system basic chip 2 to achieve the purpose of ultra-low power consumption, the data wire harness performs information interaction with a BCM or a domain controller of a vehicle body in a CAN message mode, for example, a steering lamp signal or a dangerous signal is received, wherein the dangerous signal comprises double flashing; including a particular color, such as red; special patterns such as warning patterns, exclamation marks, X symbols and the like are also included, and the application situations can include the situations such as the collision danger of a rear vehicle, the collision danger of a pedestrian, the lane change danger of a nearby vehicle and the like. The single chip microcomputer 3 calls the image data pre-stored in the image data storage chip through the I2C bus to perform processing, operation, encoding and transmission to the Mini LED driving chip 10 through the output connector. Meanwhile, the single chip microcomputer 3 can perform remote cloud upgrading software and download new image data through the whole vehicle end so as to meet the information interaction requirements of vehicles, roads and pedestrians on continuous upgrading.
In the system, the car lamp display screen can change the screen brightness in a self-adaptive manner under different weather conditions, sunlight directly irradiates the car in a sunny day, and the brightness is increased by improving the current of the Mini LED. The current of the Mini LED is reduced to reduce the brightness in cloudy days or at night, so that the light pollution is avoided. Specifically, the weather condition is detected through an on-vehicle ambient light sensor, and then the weather information is sent to the system through a vehicle body CAN signal, and the singlechip 3 comprises weather algorithm control. The weather detection sensor uses an ambient light sensor carried by the vehicle, and extra hardware cost is not required to be increased.
The vehicle lamp display screen control system provided by the invention can meet the use requirement of the vehicle lamp display screen control system in a vehicle flameout state without influencing the electric quantity of the battery. In order to reduce the consumption of an automobile battery in the prior automobile technology, the power-off processing is usually carried out on an automobile lamp display screen control system when the automobile is shut down, so that the use scene of the automobile lamp display screen control system in the automobile parking shut-down state is sacrificed. In the embodiment, the system base chip 2 is used to satisfy the use of the car light display screen control system in the flameout state of the car without affecting the electric quantity of the battery. Referring to fig. 6, the system base chip 2 uses the TLE9471ES chip made of english flying, the power supply terminal of the vehicle battery is always connected to the power supply reverse connection prevention circuit 1 of the sub-circuit of the system and the power supply input terminal of the system base chip 2 regardless of whether the vehicle is flameout, during the power-on period of the vehicle, the system base chip 2 always controls the MOS transistor 1 and the MOS transistor 2 to be turned on to supply power to the other sub-circuits, and the whole system is in a working state. During flameout of the whole vehicle, the MOS tube 1 and the MOS tube 2 are closed by the system base chip 2, so that the rear-stage sub-circuit is in a non-power state, and only the system base chip 2 is in a low-power consumption state, so that the electric quantity of a battery is hardly consumed. During flameout of the whole vehicle, the system base chip 2 CAN be awakened through the CAN communication line to open the MOS tube 1 and the MOS tube 2 again, and the MOS tube 1 and the MOS tube 2 are closed after the content of the display screen is played, so that the display screen returns to a low power consumption state.
Compared with the traditional RGB LED display unit, the invention adopts the Mini LED as the display unit, and has higher pixel density, thereby bringing better display effect. Referring to fig. 8, the size of the screen body in the inner space of the car lamp is 36.5mm by 12.5mm, and the single size of the Mini LED is 1.0mm by 1.0mm, the setting interval is 0.5mm, and 192 pieces of light can be placed in the inner space of the car lamp; if the single size of a common RGB LED is 2.5mm, only 48 LEDs can be placed. If the same pixel points as the Mini LED are required to be obtained, more pixel points can be obtained by enlarging the size of the display screen to display complex pictures or video information, and the situation cannot meet the requirement of being used in the interior of a car lamp with limited space.
The present invention will be described in detail with reference to specific examples, and fig. 7. Fig. 7 shows a right-turn indicator, when a vehicle needs to turn right at an intersection, a user dials a right-turn switch in the vehicle, the control unit obtains a right-turn signal through the CAN bus, the single-chip microcomputer 3 processes, calculates and encodes right-turn image data pre-stored in the image data storage chip and sends the right-turn image data to the display module, and the Mini LED driving chip 10 lights or turns off the corresponding Mini LED point to point according to the obtained digitized image data, and finally restores and displays a right-turn image on the display screen.
The foregoing description has described specific embodiments of the present invention. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The utility model provides a car light display screen control system based on Mini LED light source which characterized in that includes:
a control unit: the system comprises a power supply reverse connection prevention circuit (1), a system base chip (2), a single chip microcomputer (3), a DCDC controller (4), blue and green light LED power supply circuits (5), a red light LED power supply circuit (6), an image data storage chip (7) and a first connector (8);
a display unit: the LED light source module comprises a second connector (9), a Mini LED driving chip (10) and a Mini LED light source array (11);
the control unit and the display unit are in communication connection through a first connector (8) and a second connector (9).
2. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the system comprises a system base chip (2), a power supply and a single chip microcomputer (3), wherein the system base chip (2) is connected with an automobile storage battery and an automobile CAN communication line, the signal output end of the system base chip (2) is connected with the power supply reverse connection prevention circuit (1), the system base chip (2) is in communication connection with the single chip microcomputer (3), two paths of linear voltage stabilizers are integrated in the system base chip (2) and respectively provide power for the single chip microcomputer (3) and an image storage chip, the power supply reverse connection prevention circuit (1) is in power supply connection with the automobile storage battery, the output end of the power supply reverse connection prevention circuit (1) is connected with the input end of a DCDC controller (4), the output end of the DCDC controller (4) is respectively connected with a blue light LED power supply circuit (5) and a red light LED power supply circuit (6), the image data storage chip (7) is in communication connection with the single chip microcomputer (3), and the image data storage chip (7) is used for storing image data displayed by an automobile lamp, the output ends of the blue and green light LED power supply circuits (5) and the red light LED power supply circuit (6) are connected with the first connector, and the singlechip (3) is in communication connection with the first connector (8).
3. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the Mini LED driving chip (10) is in communication connection with the single chip microcomputer (3) through a first connector (8) and a second connector (9), the output end of the blue and green light LED power supply circuit (5) is connected with the input end of the Mini LED light source array (11) through the first connector (8) and the second connector (9), the output end of the red light LED power supply circuit (6) is respectively connected with the input end of the Mini LED light source array (11) and the input end of the Mini LED driving chip (10) through the first connector (8) and the second connector (9), and the Mini LED driving chip (10) is in communication connection with the Mini LED light source array (11).
4. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the power supply reverse connection preventing circuit (1) comprises a high-power NMOS tube, the output end of the reverse connection preventing circuit is controlled to be opened or closed through the high-power NMOS tube, and the system basic chip (2) is connected with the grid electrode of the high-power NMOS tube.
5. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the power supply voltage of the blue and green light LED power supply circuit is 3.8V, and the power supply voltage of the red light LED power supply circuit is 2.8V.
6. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the single chip microcomputer (3) receives and analyzes the CAN message from the system basic chip (2), calculates and processes image data to be displayed according to CAN message data and data of the image data storage chip (7), and the image data are transmitted to the Mini LED driving chip (10) through the first connector (8) and the second connector (9).
7. The vehicle lamp display screen control system based on the Mini LED light source of claim 1, wherein: the first connector (8) and the second connector (9) are of a split structure, the second connector (9) is of a patch type wire-to-board connector, and the second connector (9) and the Mini LED driving chip (10) are subjected to reflow soldering together.
8. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the Mini LED light source array adopts RGB three-color Mini LEDs or single-color Mini LEDs.
9. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: the control unit further comprises a sound assembly circuit, the sound assembly circuit comprises a driving circuit (12) and a loudspeaker (13), the power end of the driving circuit (12) is connected with the output end of the power supply reverse-connection preventing circuit (1), the single chip microcomputer (3) is connected with the driving circuit (12) in a signal mode, and the output end of the driving circuit (12) is connected with the loudspeaker (13) through a first connector (8).
10. The Mini LED light source-based vehicle lamp display screen control system according to claim 1, wherein: by acquiring external environment information, the single chip microcomputer adjusts the current of the Mini LED light source array (11) according to the external environment information, and the display brightness is changed; the external environment information comprises weather and external brightness; and the external environment information is acquired through a vehicle body sensor.
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| CN202210232692.7A CN114913809A (en) | 2022-03-09 | 2022-03-09 | Car light display screen control system based on Mini LED light source |
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| CN202210232692.7A CN114913809A (en) | 2022-03-09 | 2022-03-09 | Car light display screen control system based on Mini LED light source |
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